Composite system of telegraphy and telephony.



PATBNTED DEC, 25

v "H.IO.'RUGH. COMPOSITE SYSTEM 0E TBLE-GRAPHY AND TELEPHONY.

APPLICATION I'ILED'00T.20.1906.

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'1! v5 i lllllllllgllll To all whom it may concern; Be it known that I, HARRY O. 'RUGH, a citi- UNITED, STATES PAT T- oFFIo HARRY o.' RUGH, or SANDWICH, ILLINOIS.

COMPOSITE SYSTEM OF Then of the United States, residing at Sandvwich, in the county of Dekalb aiid'State of Illinois, have invented a certain new and useful Improvement in Composite Systems of Telegraphy and Telephony, of which the following, is a full, clear, concise, and exact description, reference bemg had to theaccoIn-' p'an'ymg. drawings,' formingfl a part of this cifieally claim the. organization herein set My invention relates: to composite systems of telephony telegraphy, the subjectmatterof theclaim's in this application being disclosedand. broadly claimed, though not 321,769, filed June 14, 19.06.

.specifically'claimed, in my application, Serial 'lNO; 'The/suh j cot-matter of my present applicaitionis the recise form thereof which is-now being insta led in practice, and I =herein'speforth.

This specification has in its concluding portion a specific description of the advantages of the subject matter of this, application, which are therefore not repeated at t 's point. My invention 'Wlll more fully appear by reference to the accompanying drawmg'and 1 transmission-line; but I do not wish to be;- limited to the number ofstations which are' 35' will be pointed out inthe claims.

The drawing-illustrates two telegraph-sta tions united'by a transmission-line and. two

telephone-stations also united bythe same thus connected/by the same tra'nsmission liner The transmission-line 1 is shown as'forming telegraphicconnection betweentwo telegraph-stations A' B and 'tele honic connection between telephone-statlons C D. At

' each telegraph-station thereis shown a part.

l is indicated a telephone switch-hook- 6, that has a normal contact 7- normally establishing with the switch-hook a. signal-receiving circuit at the corresponding telephone-station.

The signal sending'appliance at each .te ephonestation includes a signaling key 9; the

contacts 10 land 11, that are electrically -con grap'h-ke .groundth tions; There is shown included in series v of the usual telegraphic apparatus, the part illustrated including aline-relay 2, atelecon uctor 1 at the t'elegraph-st awith the line at station A a closed-circuit battery 4. At each telephone station there nected withthe switch element 12 when the Specification of Letters- Patent; Application filedOQtOhQr'ZO, 1996i Serial No. 339,832.

3, to ether'wi'th connections that TELEGRAF'HYTAND- TELEPHONY.

Patented Dec. 1.906.

the primary 14 of 'the induction coil, which primary constitutesa vwindingof a circuit breaker or interru ter; the armature 15,. and the back contact or said armature. the push-button ,9 is'de lressed, localr circuit including the primary 14. 'is established,

.' ipush-button 9 is actuated; the battery '13;

When

whereby owing to the interruption of this circuit at 15 signaling-current is induced-into the secondary. '16, through the agency of which secondary signalingwu'rrents are im pressed upon ,the transmission-line; The signaling currents received. at each telephonestation i'nay 'b'e traced as follows: Assuming that the push-buttonQ is depressed afistation ,0, our ent induced in the windin 1.6 isimpresse .upon the line and "finds circuit from the (ground 17 at said'stationC, through the con'enser 18, the condenser 19, the. coil .16, the jcontact elements 11/12, the condenser .2Q,-'th'e" transmission-line 1, the condenser 20 'at'ithe. receiving-station D, the switch element 12,th e normal back contact, 21 of said switch element 12, the switch-hook 6, the contac't17 of said switch-hook, the signal-re- Gam r, preferably a howler 22, the condensers 1918 at station D, to the ground 17.

When the switch-hook. is raised at a tele phhne stati'omthe primary 14 is included in a'local circuit with the battery 13 and the transmitter 23 thereat, and voice-currents are impressed upon the telephone-line through a sprihg 1.2 a't the receiving-station, thecon- 1 tact 21, the switch-hook '6, the 0 mm 25, the receiver 24 coil-16, the condensers 19 and 18, to the ground 17 impulsesfrom finding telephonic apparatus, provide quadrilateral connections at each of the telephonestations, as indicated. -'Two adjacent sides .In orderto prevent the abrupt telegraphic passage through the i .26 27 each quadrilateral have their terminal, 28,-conne'cted with that portion of the corresponding telegraph-station.

the-transmission-conductor 1 extending tof These sides-26:. and 27 are of the same high impedance and ohmic resistance. The terminals.

29 so of the sides 26 27 also constitute terminals of the impedance devices 31 32, which latter devices are of substantially the same high impedance and of the same ohmic resistance. The ohmic resistance of each of the devices 26 27 31 32 is preferablylow. The devices 31 32 have a common terminal 33. The telephonic-circuit connections are effected at the telephone-stations by connecting the. telephonic conductors with the terminals 29 and 30, whereby through the agency of the impedance devices 26 27 31 32 the tele hone instruments are not subject'to the te egraphic currents impressed upon the transmission-line at the telegraphstations. While the impedance devices-26 27 31 32 guard the telephonic apparatus erfectly from the action of the telegra ic currents impressed'at the points 28, sai impedance devices would prevent the transmission of telephonic currents between the telephone-stations, and I therefore supplement certain of these impedance devices with instrumentalities that will permit of telephonic communication between the telephone-stations, which at the same time will not deprive said impedance devices of.

' about said im edance devices to be of exrequired tremely high 0 mic resistance, whereby the objectionable passage of tele raphic current is not permitted by said con ensers, but the passage'of telephonic current is afforded.

It will be seen that I have provided a composite system of telegraphy and telephony including a transmission-conductor, a plurality of telegraph-stations connected thereby, a luralityof telephone-stations also connecte thereby, said transmission-conductor normally permanently extending to all of said telegra hic and telephone stations, a

quadrilatera of connections at each telephone-station, each side'of which quadriateral includes an impedance device ermitting the passage of current between t e telegraph-stations, the im edance devices in two opposite sides of eac quadrilateral being s unted by devices (preferably condensers) that permit the passage of telephonic current and substantial y preventing the passage of telegraphic current, the telephone-receiver at each telephone-station having one of its terminals connected between two of a pair of the sides of said quadrilateral and its other terminalconnected between the two SidQS'Qf the remaining pair of sides of said quadrilateral in a manner to have the telephone-receiver terminals telephonically connected 'with' the transmission-line by the shunts established about two of the impedance devices in said quadrilateral, the said pairs of sides of said quadrilateral each bemg connected in series with the transmission- -conductor, the telegraphic stations also being inserial relation with said quadrilateral, and a conductor at each telephone-station including acondenser and having connection with that ortion of the transmission-line from which the telephonic currents are directed.

Further analysis of the system of my invention'will not be required, as the advantages thereof Will be at once pert nent to those skilled in the art.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A composite system of 'telegraphy and telephony includin a transmission-conductor, a plurality of tedegraph-stations connected thereby, a luralit of telephone-stations also connecte there y, said transmissionconductor normally permanentl extending to all of said telegraphic and te ephone stations, a quadrilatera of connections at each telephone-station, each side of which quadrilateral includes an impedance device permitting the passage of current between the telegraph-stations, the impedance devices in two oppositesides of each uadrilateral being shunted by condensers, t e telephone-receiver at each telephone-station having one of its terminals connected between two of a pair of the sides of said quadrilateral and 1338 other terminal connected between the two sides of the remaining pair of sides of said qu ateral, in a manner to have the teleph e;receiver terminals telephonically connect'd with the transmission-line by the shunts established about two of the impedance devices in said quadrilateral, the said pairs of sides of said quadrilateral each being connected in series with the transmissionconductor, the telegraphic stations also bein in serial relation with said quadrilateral, an a conductor at each telephone-station includin a condenser and having connection with t at portion of the transmission-line from which the telephonic currents are directed.

2. A composite system of tclegraphy and telephony includin a transmission-conductor, a plurality ofte egraph-stations connect:

ed thereby, a plurality of telephone-stations also connected thereby, said transnnssionconductor normally permanently extending to all of'said telegra hic and telephone stations, a quadrilatera of connections at each telephone-station, each side of which quadrilateral includes an impedance device perfsa9,21o v 7' 8 mitting the passage of current'between the telegraph-stations, the impedance devices in two opposite sides of'each quadrilateral beingshunted by devices that permit the passage of telephonic current and substantially preventing the passage of telegraphic current, the telephone-receiver at. each telephone-station having one of its terminals connected between two of a pair of the sides of said' quadrilateraland its other terminal connected between the two sides of the remaining pair of sides of said quadrilateral, in a manner to have the telephone-receiver ter- -mina1s telephonically connected with the transmission-line by the shunts established about two of he im 'edance devices in said quadrilateral, the said pairs of sides of said quadrilateral each beingconnected in series with the. transmission-conductor, the tele-' 'gra hic stations also being in serialrelation wit said quadrilateral, and a conductor at eachtelephone-statiOn including a condenser and having connection with that portion of the transmission-line from which the telephonic currents are directed.

3. A composite system of telegraphy and telephony includin a transmission-conductor, ,a plurality of te egraph-stations connected thereby, a plurality of telephone-stations also connected thereby, said transmissionconductor normally permanentl extending to all of said telegraphic and te ephone stations, a quadrilateral of connections at each telephone-station, each side of-which quadrilateral includes an impedance device permitting the passage of current between the I telegraphstations, the impedance devices in two opposite sides of each quadrilateral being shunted by condensers, the telephonareceiver at each telephone-station having one of its-terminals connected between two oi a pair of the sidesof said quadrilateral and its other terminalconnected between the two sides of the remaining pairof sides of said A conductor normally permanently extending to all of said telegraphic and telephone stations, a quadrilateral of connections at each jtelephonestation, each side of which .quadrilateral includes an impedance device permitting the terminal connected between two sides of the remaining pair of sides of said quadrilateral, in a manner to have the telephone-receiver terminals telephonically con nected with the transmissiondine by the shunts established about two of the impedance devices in said quadrilateral, the 'said pairs of sides of said quadrilateral each being connected in series with the transmission I conductor, the telegraphic stations also being in serial relation with. said quadrilateral.

n witness whereof I hereunto subscribe my name this 16th day of October, D.v 1906. 1

HARRY o. RUGH.

' Witnesses: I LEoN G. S'rnoir, G. L. CRAGG. 

